Open Device Manager to ensure the COM ports, such as FC-Application Interface and FC-PC UI Interface are properly installed. If you can’t find them, you need to install the drivers given in step 2 once again.

Download DC-Unlocker from here, open it and click on magnifying glass to detect the modem. Type the below command at the end of the result and press enter AT^NVRDEX=50503,0,128

9. The above command will generate some hash code.Copy and paste the hash code in the comment section to get the unlock code.

Unlock code is not free. You will have to pay 5 USD to get the Unlock Code. Kindly proceed only if you agree to pay the same.